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A method for preparing polycrystalline transparent ceramics from natural fluorite minerals

A polycrystalline transparent and fluorite technology is applied in the field of preparing polycrystalline transparent ceramics to achieve the effects of shortening the preparation cycle, broadening the source range and simple operation

Active Publication Date: 2020-03-17
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Currently preparing CaF 2 The raw materials selected for polycrystalline transparent ceramic materials such as fluoride are artificially synthesized high-purity fluoride nanopowders. There have been no research results on the preparation of fluoride polycrystalline transparent ceramic materials using natural fluorite minerals as raw materials. Therefore, we provide A method for preparing polycrystalline transparent ceramics from natural fluorite minerals is a method worthy of research

Method used

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  • A method for preparing polycrystalline transparent ceramics from natural fluorite minerals
  • A method for preparing polycrystalline transparent ceramics from natural fluorite minerals
  • A method for preparing polycrystalline transparent ceramics from natural fluorite minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Grinding of natural fluorite minerals: select natural fluorite minerals as raw materials, and grind the minerals into fine powders with a particle size of less than 100 μm;

[0026] 2) Sample loading of mineral powder raw materials: choose a graphite mold with an inner diameter of 40 mm, line the mold with graphite paper, weigh 10 g of fluorite ore powder and put it into the mold, the graphite paper separates the mold from the powder, graphite Paper thickness is 0.2 mm;

[0027] 3) Sintering of polycrystalline transparent ceramics: Put the filled graphite mold into a vacuum hot-press furnace, evacuate to better than 10 Pa, heat up to 1100 °C at a rate of 10 °C / min, and then apply a pressure of 30 MPa, keep warm 120 min;

[0028] 4) Treatment of polycrystalline transparent ceramics: After the graphite mold and ceramic samples are cooled to room temperature with the furnace, they are taken out, and the ceramic samples are polished with different types of sandpaper, an...

Embodiment 2

[0031] 1) Grinding of natural fluorite minerals: select natural fluorite minerals as raw materials, and grind the minerals into fine powders with a particle size of less than 100 μm;

[0032] 2) Sample loading of mineral powder raw materials: choose a graphite mold with an inner diameter of 40 mm, line the mold with graphite paper, weigh 10 g of fluorite ore powder and put it into the mold, the graphite paper separates the mold from the powder, graphite Paper thickness is 0.2mm;

[0033] 3) Sintering of polycrystalline transparent ceramics: Put the filled graphite mold into a vacuum hot-press furnace, evacuate to better than 10 Pa, raise the temperature to 1200 °C at a rate of 10 °C / min, and then apply a pressure of 30 MPa, keep warm 120 min;

[0034] 4) Treatment of polycrystalline transparent ceramics: After the graphite mold and ceramic samples are cooled to room temperature with the furnace, they are taken out, and the ceramic samples are polished with different types of ...

Embodiment 3

[0036] 1) Grinding of natural fluorite minerals: select natural fluorite minerals as raw materials, and grind the minerals into fine powders with a particle size of less than 100 μm;

[0037] 2) Sample loading of mineral powder raw materials: choose a graphite mold with an inner diameter of 40 mm, line the mold with graphite paper, weigh 10 g of fluorite ore powder and put it into the mold, the graphite paper separates the mold from the powder, graphite Paper thickness is 0.05 mm;

[0038] 3) Sintering of polycrystalline transparent ceramics: Put the filled graphite mold into a vacuum hot-press furnace, evacuate to better than 10 Pa, heat up to 1100 °C at a rate of 15 °C / min, then apply a pressure of 30 MPa, and keep warm 60 minutes;

[0039] 4) Treatment of polycrystalline transparent ceramics: After the graphite mold and ceramic samples are cooled to room temperature with the furnace, they are taken out, and the ceramic samples are polished with different types of sandpaper...

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Abstract

The invention discloses a method for preparing polycrystalline transparent ceramic by taking natural fluorite mineral as a raw material. The method comprises the following steps: 1) selecting the natural fluorite mineral as the raw material; grinding the mineral into fine powder with the granularity less than 100mu m; 2) selecting a graphite mold and padding graphite paper in the mold; filling the mold with the fluorite mineral powder obtained by step 1) and separating the mold from the powder through the graphite paper; 3) putting the filled graphite mold into a vacuum hot pressing furnace and sintering; 4) after sintering, taking out ceramic and carrying out double-faced polishing treatment to obtain the polycrystalline transparent ceramic. Compared with an existing technology for preparing fluoride polycrystalline transparent ceramic, the method selects the natural fluorite mineral as the raw material for preparing the polycrystalline transparent ceramic through a technological flow of grinding the mineral, sintering, carrying out post-treatment and the like. The method disclosed by the invention has the advantages that the method is simple to operate, and a flow of artificially synthesizing fluoride powder is not used, so that a preparation process of the polycrystalline transparent ceramic is simplified; the method has no pollution to the environment and is environmentally friendly.

Description

technical field [0001] The invention relates to the field of preparation of polycrystalline transparent ceramics, in particular to a method for preparing polycrystalline transparent ceramics using natural fluorite minerals as raw materials. Background technique [0002] Fluorspar is an inorganic non-metallic mineral resource of great strategic significance and has a wide range of industrial uses. Fluorite deposits are widely distributed in China, mainly in Zhejiang, Hunan, Jiangxi, Fujian, Henan and Inner Mongolia. The efficient utilization and development of fluorite mineral resources plays a very important role in the development of modern industry. With the rapid development of the world economy, the demand and consumption of mineral resources continue to rise, and the application of mineral resources including fluorspar has been paid more and more attention. Rational development of my country's fluorite resources, increase the added value of mineral products, will be a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/553C04B35/622C04B35/64
CPCC04B35/553C04B35/622C04B35/64C04B2235/5436C04B2235/6562C04B2235/658C04B2235/6581C04B2235/9653
Inventor 刘作冬贾梦盈井强山刘鹏于永生
Owner XINYANG NORMAL UNIVERSITY
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